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by Juniper
Product Line: Juniper EX4300 Series
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Product Description

The EX-UM-2QSFP Juniper Uplink Module enhances the EX4300-32F and EX4300-32F-DC switches by adding 2-port 40GbE QSFP+ capabilities, allowing for a maximum of 4 40GbE ports with the module. It supports a 320 Gbps Virtual Chassis interconnect to unify up to 10 units into a single logical device, ensuring efficient network scalability. Designed for flexibility, it features an 8-port dual-mode 10GbE/1GbE module with pluggable SFP+/SFP optics, operating within a temperature range of 32° F to 113° F and up to 10,000 ft in altitude, accommodating diverse environmental conditions.

FAQs for the EX-UM-2QSFP

  • What is the maximum number of 10GbE ports available on the EX4300-32F with the addition of modules?
    With modules, the EX4300-32F supports up to 12 10GbE ports.
  • How does the EX4300 2-port 40GbE QSFP+ Uplink Module enhance the EX4300-32F's capabilities?
    It adds two 40GbE ports, increasing the maximum available to four when fully equipped with modules.
  • What power supply rating does the EX4300-32F feature?
    The EX4300-32F is equipped with a 350 W AC power supply.
  • Describe the Virtual Chassis interconnect capacity of the EX4300-32F.
    It can combine up to 10 units as a single logical device with a 320 Gbps Virtual Chassis interconnect.
  • What are the physical dimensions of the EX4300-32F with the power supply and front module installed?
    Dimensions are 17.36 x 1.72 x 19.31 inches (44.1 x 4.37 x 49.1 cm).
  • What is the system weight of the EX4300-32F?
    The system weighs 13 lb (5.9 kg).
  • What operating temperature range does the AFO model of the EX4300-32F support?
    The operating temperature range is 32° F to 113° F.
  • How many field-replaceable fans are included in the EX4300-32F?
    There are two field-replaceable fans.
  • What is the operating altitude limit for the EX4300-32F?
    The operating altitude limit is up to 10,000 ft (3,049 m).
  • What is the maximum inrush current for the EX4300-32F?
    The maximum inrush current is 50 amps.

Product Review

The Juniper EX-UM-2QSFP offers significant flexibility with its 2-port 40GbE QSFP+ uplink module, enhancing connectivity options for the EX4300-32F and EX4300-32F-DC switches. Its capability to support a 320 Gbps Virtual Chassis interconnect to combine up to 10 units as a single logical device is advantageous for scalable network infrastructure. However, the initial power supply rating at 350 W AC might limit power availability for high-density deployments, necessitating careful planning for power management in environments requiring higher power consumption.


The Juniper EX-UM-2QSFP is an uplink module designed for the EX4300-32F and EX4300-32F-DC switch models, offering enhanced connectivity and performance capabilities. This module provides two 40GbE QSFP+ ports, significantly expanding the network's bandwidth and facilitating high-speed connections. When installed, it increases the maximum number of 10GbE ports to 12 and 40GbE ports to 4, allowing for flexible network configurations and scalability. This uplink module is compatible with a 350 W AC power supply, ensuring reliable power delivery for high-demand operations. It supports a 320 Gbps Virtual Chassis interconnect, which enables the combination of up to 10 units into a single logical device. This feature simplifies management and enhances network performance by providing a seamless, scalable platform for data exchange. The EX-UM-2QSFP also includes an 8-port dual-mode 10GbE/1GbE module compatible with pluggable SFP+/SFP optics, offering versatility in network design and connectivity options. The module's maximum current inrush is rated at 50 amps, highlighting its capacity to handle significant power surges without compromising performance. For environments requiring DC power, the module supports a 550 W DC power supply with an input voltage range of 43.5-60 V max (+/- 0.5 V), including both AFO (front-to-back airflow) and AFI configurations. This ensures adaptability to various data center power infrastructures and enhances system reliability. Dimensions and weight are critical for planning and deploying network hardware. The base unit measures 17.36 x 1.72 x 17.87 inches (44.1 x 4.37 x 45.4 cm), and with the power supply installed, the dimensions extend slightly to 17.36 x 1.72 x 19 inches (44.1 x 4.37 x 48.28 cm). With both the power supply and front module installed, the total dimensions are 17.36 x 1.72 x 19.31 inches (44.1 x 4.37 x 49.1 cm). The system weight stands at 13 lbs (5.9 kg), facilitating installation and maintenance. Operating and storage conditions are crucial for ensuring the longevity and reliability of networking hardware. The EX-UM-2QSFP operates efficiently within a temperature range of 32°F to 113°F for AFO models, accommodating various data center environments. The module's storage temperature range extends from -40°F to 158°F, ensuring component integrity during non-operational periods. It can operate up to 10,000 ft (3,049 m) and be stored up to 16,000 ft (4,877 m), with relative humidity levels during operation and storage ranging from 10% to 85% (non-condensing) and 0% to 95% (non-condensing), respectively. Key features include: -
  • Support for up to two 40GbE QSFP+ ports
  • 320 Gbps Virtual Chassis interconnect capability
  • Dual-mode 10GbE/1GbE module compatibility with SFP+/SFP optics
Equipped with field-replaceable fans, the module ensures continuous, reliable operation by maintaining optimal cooling even under heavy load conditions. The Juniper EX-UM-2QSFP uplink module represents a comprehensive solution for expanding network capacity and performance, offering a blend of high-speed connectivity, flexibility, and reliability for enterprise networks.


Product IDJuniper EX-UM-2QSFP
CompatibilityEX4300-32F, EX4300-32F-DC
Access Ports32-port 100/1000BASE-X
10GbE Ports (with module)Up to 12 (base 4)
40GbE Ports (with module)Up to 4 (base 2)
AC Power Specification350 W AC
Airflow OrientationFront-to-back
Virtual Chassis Bandwidth320 Gbps, connect up to 10 units
Module Type8-port dual-mode 10GbE/1GbE, SFP+/SFP compatible
Peak Current50 amps
DC Power Options550 W DC AFO and 550 W DC AFI, 43.5-60 V input (+/- 0.5 V), dual feed
Dimensions Base Unit17.36 x 1.72 x 17.87 inches (44.1 x 4.37 x 45.4 cm)
Dimensions with Power Supply17.36 x 1.72 x 19 inches (44.1 x 4.37 x 48.28 cm)
Dimensions with Power Supply and Module17.36 x 1.72 x 19.31 inches (44.1 x 4.37 x 49.1 cm)
Weight13 lb (5.9 kg)
Operating Temperature Range (AFO)32° to 113° F
Storage Temperature Range-40° to 158° F
Maximum Operating Altitude10,000 ft (3,049 m)
Maximum Non-operating Altitude16,000 ft (4,877 m)
Operating Humidity Range10% to 85% (noncondensing)
Non-operating Humidity Range0% to 95% (noncondensing)
Fans (Field-replaceable)2

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